Not sure @Ed McCarronif you upgraded but @Primal Decals I found a way on SCAP 4 to make the letters follow the circle perfectly.
Here's what I did:
Make your circle to what ever size, then do your text in a straight line.
Select the text and the circle at the same time
Go to the "effects" tab on the top, then click "object on path"
Bam it turned out awesome